Does the DSP cause the RCD to trip?

As the DSP surge protection component is MOV type between L-N ,N-E, there may be a very small leakage current from Live to earth caused by the MOV normal operation. The RCD may see this as an imbalance between its live and neutral currents thereby causing the RCD to trip. Suggest fit the DSP before the RCD i.e. on the RCD's input terminal side. DSP is a device that is fitted in parallel across the L-N and earth.

Where should you install a DSP when you have an RCD installed?

Best to put the DSP before the RCD.

DSP3P-170 – Maximum Surge Handling 170kA per phase

Home / Voltage Protection / Voltsafe / Single Phase: Direct Wiring - T1+T2 / DSP3P-170 – Direct Wiring

Description

Designed to provide primary high capacity industrial surge protection at main service entrance locations, the DSP3P-170 gives ten-mode protection with a maximum surge handling capacity of 170kA per phase Type II. It is also a Type I device offering 50kA @ (10/350µs). With built-in redundant full varistor networks, this DSP ensures your premises are never unprotected. Visual warning or remote warning alerts the operator of the failure of one varistor network while the redundant unit keeps protecting the site thus ensuring your equipment is always protected, even after a direct strike. The unit’s enclosure is IP66 rated.

Model Product Code

DSP3P-170-T1 9M315010
Specification

Max Surge Current 170kA

Remote Connect Yes

Indication Green LED on: Protection present Green LED off: Internal failure

Weight 3.2kg

Dimensions 214 x 297 x 123mm
Downloads
Brochures
- Voltsafe Suppressor Brochure (3MB)
Click on the question to get the full answer.

Does the DSP cause the RCD to trip?
As the DSP surge protection component is MOV type between L-N ,N-E, there may be a very small leakage current from Live to earth caused by the MOV normal operation. The RCD may see this as an imbalance between its live and neutral currents thereby causing the RCD to trip. Suggest fit the DSP before the RCD i.e. on the RCD's input terminal side. DSP is a device that is fitted in parallel across the L-N and earth.
Where should you install a DSP when you have an RCD installed?
Best to put the DSP before the RCD.
What MCB rating does one use for the Live wire on the DSP-1P?
It uses the B32 rating.

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